STANDARD SPECIFICATIONS
2-3
General Torque
Specifications (rev. 4/97)
Table 2-3: General Torque Specifications
TORQUE SPECIFIED IN FOOT POUNDS -
This chart provides tightening torques for general purpose applications
when special torques are not specified on process or drawing. Assembly torques apply to plated nuts and capscrews
assembled without supplemental lubrication (as received condition). They do not apply if special graphite moly-disulfide or
other extreme pressure lubricants are used. When fasteners are dry (solvent cleaned) add 33% to as received condition
torque. Bolt head identification marks indicate grade and may vary from manufacturer to manufacturer. Thick nuts must be
used on grade 8 capscrews. Use value in [ ] if using prevailing torque nuts.
UNC
SIZE
SAE
Grade 2
SAE
Grade 5
SAE
Grade 8
UNF
SIZE
SAE
Grade 2
SAE
Grade 5
SAE
Grade 8
1/4-20
4
[5]
6
[7]
9
[11]
1/4-28
5
[6]
7
[9]
10
[12]
5/16-18
8
[10]
13
[13]
18
[22]
5/16-24
9
[11]
14
[17]
20
[25]
3/8-16
15
[19]
23
[29]
35
[42]
3/8-24
17
[21]
25
[31]
35
[44]
7/16-14
24
[30]
35
[43]
55
[62]
7/16-20
27
[34]
40
[50]
60
[75]
1/2-13
35
[43]
55
[62]
80
[100]
1/2-20
40
[50]
65
[81]
90
[112]
9/16-12
55
[62]
80
[100]
110
[137]
9/16-18
60
[75]
90
[112]
130
[162]
5/8-11
75
[94]
110
[137]
170
[212]
5/8-18
85
[106]
130
[162]
180
[225]
3/4/10
130
[162]
200
[250]
280
[350]
3/4-16
150
[188]
220
[275]
320
[400]
7/8-9
125
[156]
320
[400]
460
[575]
7/8-14
140
[175]
360
[450]
500
[625]
1-8
190
[237]
408
[506]
680
[850]
1-14
210
[263]
540
[675]
760
[950]
1-1/8-7
270
[337]
600
[750]
960
[1200]
1-1/8-12
300
[375]
660
[825]
1080
[1350]
1-1/4-7
380
[475]
840
[1050
1426
[1782]
1-1/4-12
420
[525]
920
[1150]
1500
[1875]
1-3/8-6
490
[612]
1010
[1375]
1780
[2225]
1-3/8-12
560
[700]
1260
[1575]
2010
[2512]
1-1/2-6
650
[812]
1460
[1825]
2360
[2950]
1-1/2-12
730
[912]
1640
[2050]
2660
[3325]
1-3/4-5
736
[920]
1651
[2063]
2678
[3347]
1-3/4-12
920
[1150]
2063
[2579]
3347
[4183]
METRIC:
Coarse thread metric class 10.9 fasteners and class 10.0 nuts and through hardened flat washers, phosphate coated,
Rockwell “C” 38-45. Use value in [ ] if using prevailing torque nuts.
Nominal
thread
diameter
(mm)
Newton
Meters
(Standard
Torque)
Foot Pounds
(Standard
Torque)
Nominal
Thread
Diameter
(mm)
Newton
Meters
(Standard
Torque)
Foot Pounds
(Standard
Torque
6
10
[14]
7
[10]
20
385
[450]
290
[335]
7
16
[22]
12
[16]
24
670
[775]
500
[625]
8
23
[32]
17
[24]
27
980
[1105]
730
[825]
10
46
[60]
34
[47]
30
1330
[1470]
990
[1090]
12
80
[125]
60
[75]
33
1790
[1950]
1340
[1450]
14
125
[155]
90
[115]
36
2325
[2515]
1730
[1870]
16
200
[240]
150
[180]
39
3010
[3210]
2240
[2380]
18
275
[330]
205
[245]
